Rahat Fateh Ali Khan was flown down especially from Pakistan for the recording of Rabba song in Main Aur Mrs Khanna.

A source said, "Music directors Sajid Wajid felt that it was only Rahat Fateh Ali Khan's voice that could do justice to the Rabba song. He came from Pakistan to record it."

But ten minutes after recordings, Rahat broke down into tears. The unit wondered what had gone wrong. Had someone behaved badly or hurt the sensitive singer.

"It was only probing, that Rahat revealed the truth. He had just lost his mother a few days back and the Rabba track had made him so emotional that he could not help, but cry. Sajid Wajid were moved by Rahat's plight and offered their condolences to the singer."